<template>
  <div class="father">
    <h3>父组件</h3>
    <h4>房产：{{ house }}</h4>
    <button @click="changeToy">修改Child1的玩具</button>
    <button @click="changeComputer">修改Child2的电脑</button>
    <button @click="getAllChild($refs)">让所有孩子的书变多</button>
    <Child1 ref="c1" />
    <Child2 ref="c2" />
  </div>
</template>

<script setup lang="ts" name="Father">
import Child1 from "./Child1.vue";
import Child2 from "./Child2.vue";
import { ref, reactive } from "vue";
let c1 = ref();
let c2 = ref();

// 注意点：当访问obj.c的时候，底层会自动读取value属性，因为c是在obj这个响应式对象中的
/* let obj = reactive({
		a:1,
		b:2,
		c:ref(3)
	})
	let x = ref(4)

	console.log(obj.a)
	console.log(obj.b)
	console.log(obj.c)
	console.log(x) */

// 数据
let house = ref(4);
// 方法
function changeToy() {
  c1.value.toy = "小猪佩奇";
}
function changeComputer() {
  c2.value.computer = "华为";
}
function getAllChild(refs: { [key: string]: any }) {
  console.log(refs);
  for (let key in refs) {
    refs[key].book += 3;
  }
}
// 向外部提供数据
defineExpose({ house });
</script>

<style scoped>
.father {
  background-color: rgb(165, 164, 164);
  padding: 20px;
  border-radius: 10px;
}

.father button {
  margin-bottom: 10px;
  margin-left: 10px;
}
</style>
